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Add vtable and methods for to_json and to_ami for Stasis messages

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When a Stasis message type is defined in a loadable module, handling
those messages for AMI and res_stasis events can be cumbersome.

This patch adds a vtable to stasis_message_type, with to_ami and
to_json virtual functions. These allow messages to be handled
abstractly without putting module-specific code in core.

As an example, the VarSet AMI event was refactored to use the to_ami
virtual function.

(closes issue ASTERISK-21817)
Review: https://reviewboard.asterisk.org/r/2579/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@391403 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
David M. Lee
2013-06-11 15:46:35 +00:00
parent 2053fc3159
commit dbdb2b1b3a
8 changed files with 430 additions and 119 deletions
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94
main/stasis_channels.c
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@@ -36,29 +36,24 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/astobj2.h"
#include "asterisk/stasis_channels.h"
#define NUM_MULTI_CHANNEL_BLOB_BUCKETS 7
/*** DOCUMENTATION
<managerEvent language="en_US" name="VarSet">
<managerEventInstance class="EVENT_FLAG_DIALPLAN">
<synopsis>Raised when a variable is set to a particular value.</synopsis>
<syntax>
<xi:include xpointer="xpointer(/docs/managerEvent[@name='Newchannel']/managerEventInstance/syntax/parameter)" />
<parameter name="Variable">
<para>The variable being set.</para>
</parameter>
<parameter name="Value">
<para>The new value of the variable.</para>
</parameter>
</syntax>
</managerEventInstance>
</managerEvent>
***/
/*!
* @{ \brief Define channel message types.
*/
STASIS_MESSAGE_TYPE_DEFN(ast_channel_snapshot_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dial_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_varset_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_user_event_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hangup_request_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dtmf_begin_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dtmf_end_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hold_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_unhold_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_chanspy_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_chanspy_stop_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_fax_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hangup_handler_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_moh_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_moh_stop_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_monitor_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_monitor_stop_type);
/*! @} */
#define NUM_MULTI_CHANNEL_BLOB_BUCKETS 7
/*! \brief Topic for all channels */
struct stasis_topic *channel_topic_all;
@@ -540,6 +535,36 @@ void ast_channel_publish_varset(struct ast_channel *chan, const char *name, cons
ast_channel_publish_blob(chan, ast_channel_varset_type(), blob);
}
static struct ast_manager_event_blob *varset_to_ami(struct stasis_message *msg)
{
RAII_VAR(struct ast_str *, channel_event_string, NULL, ast_free);
struct ast_channel_blob *obj = stasis_message_data(msg);
const char *variable =
ast_json_string_get(ast_json_object_get(obj->blob, "variable"));
const char *value =
ast_json_string_get(ast_json_object_get(obj->blob, "value"));
if (obj->snapshot) {
channel_event_string =
ast_manager_build_channel_state_string(obj->snapshot);
} else {
channel_event_string = ast_str_create(35);
ast_str_set(&channel_event_string, 0,
"Channel: none\r\n"
"Uniqueid: none\r\n");
}
if (!channel_event_string) {
return NULL;
}
return ast_manager_event_blob_create(EVENT_FLAG_DIALPLAN, "VarSet",
"%s"
"Variable: %s\r\n"
"Value: %s\r\n",
ast_str_buffer(channel_event_string), variable, value);
}
void ast_publish_channel_state(struct ast_channel *chan)
{
RAII_VAR(struct ast_channel_snapshot *, snapshot, NULL, ao2_cleanup);
@@ -626,6 +651,31 @@ int ast_channel_snapshot_caller_id_equal(
strcmp(old_snapshot->caller_name, new_snapshot->caller_name) == 0;
}
/*!
* @{ \brief Define channel message types.
*/
STASIS_MESSAGE_TYPE_DEFN(ast_channel_snapshot_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dial_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_varset_type,
.to_ami = varset_to_ami,
);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_user_event_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hangup_request_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dtmf_begin_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_dtmf_end_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hold_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_unhold_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_chanspy_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_chanspy_stop_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_fax_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_hangup_handler_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_moh_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_moh_stop_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_monitor_start_type);
STASIS_MESSAGE_TYPE_DEFN(ast_channel_monitor_stop_type);
/*! @} */
static void stasis_channels_cleanup(void)
{
channel_topic_all_cached = stasis_caching_unsubscribe_and_join(channel_topic_all_cached);